Vocabulary

mastodons - prehistoric furry elephants unvanquished - undefeatable bulkhead - a framework with a sloping door giving access to a cellar demeanor - an expression or reaction ornithopter - an experimental device propelled by flapping wings sobriquet - a nickname obligation - a promise; a duty illiterate - not able to read or write accommodate - make room for custody - legal confinement, or kept inside
 * Week 1**